Testing the mechanisms by which source-sink dynamics alter competitive outcomes in a model system.

摘要: Abstract: Dispersal among sites can affect within‐site competitive outcomes via source‐sink dynamics. Source‐sink dynamics are thought to primarily spatial subsidies: by redistributing individuals from sources sinks, alter in both and sinks. However, dispersal also demography modification, which occurs when alters the parameters governing species’ per capita demographic rates. For instance, of exploitative competitors might cause extinction some resources for competition occurs, thereby altering coefficients. I used protist microcosms as a model system test whether subsidies alone could explain effects on outcomes. examined long‐term outcome three bacterivorous ciliate protists high enrichment (sources) low (si...